Notebook Memory Parity Error (Dell Latitude D820)

January 10th, 2010 Category: General

Recently my several years old Dell Latitude D820 began to freeze several times, around 1 time a day. It happened never all the years before. The last half year I’ve upgraded to Windows 7 Ultimate and purchased new 4GB RAM, but the freezes started a few weeks ago. This is why I think the problem is not related with Windows 7. For checking the hardware I’ve used the Dell diagnostic tool without detecting and problems.

One time a blue screen was displayed with a memory parity error. So I’ve tried to remove first one RAM and after still having freezes the other one. Still with the problem.

After reading many posts which said this may not only be a problem of the RAM, it may be also a problem of:

  • motherboard
  • graphics card
  • WLAN (WiFi) card
  • …

Removing the WLAN card isn’t difficult, so I did. Furthermore I’ve disabled everything with WLAN and Bluetooth in the BIOS. Afterwards the notebook was running without problems for a few days.

Today I’ve put the WLAN card back into the Notebook (BIOS settings still disabled) and after a few hours a freeze happened again with crazy graphics output.

It seems that the WLAN card causes this problem in my case. It’s not 100 percent proofed but I’ll do further checks and reports.

Update 28th January 2010

Since the last crash after a few hours putting the WLAN card back in the Notebook it runs stable now. WLAN and Bluetooth is still disabled in the BIOS. It really looks that WLAN or Bluetooth causes the problem in my case.

Update 13th August 2010

In the mean time I’ve recognized that the fan on the left side was blocked by dust. To remove the dust it’s needed to open your notenbook. You have to release quite a lot screws to achieve this, instructions can be found on the internet. After removing the dust from the fan the notebook works much more stable.

Additionally I’ve installed a SSD hard disc. This is pretty cool, you will recognize a noticeable difference:

  • performance (boot time and general)
  • notebook stays cooler
  • saves power when running notebook on battery

Putting a SSD into your notebook, a thing I can really recommend.

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This entry was posted on Sunday, January 10th, 2010 and is filed under General. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.
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2 Responses to “Notebook Memory Parity Error (Dell Latitude D820)”

  1. John Feairheller on August 13th, 2010 at 07:48

    In April of 2010, my D820 froze and after forcing a shut down by holding the power button it failed to get past the windows XP splash screen.

    Ran all the diagnostics and every thing checks out. Disabled devices and found the system would boot when the WLAN was disabled in the boot bios.

    I presumed that the card was defective and interrupting the boot sequence. After installing a replacement Dell P/N ONC 293 the problem is still present.

    At present I have either a working D820 without wireless or an electronic paperweight.

    Is this actually a motherboard problem showing up as a WLAN interrupt problem or is the WLAN card easy to blow during installation? Anyone?

  2. Octavio Lotridge on November 30th, 2010 at 21:29

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